Just a heads up Savegame Manager GX seems to work out of the box. I also had it in the settings to IOS 58, if that changed anything. I would assume Gamesave would work, BUT I only tried to install Miis. Miis work for sure. Just press the "Manage All" button if you wan to do a batch install/extract
Also, is it possible to safely install Check Mii Out Channel
Also, is it possible to safely install Check Mii Out Channel